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Table 2 Follow-up scores and the change scores for PROMs according to the GPE-scale

From: Follow-up score, change score or percentage change score for determining clinical important outcome following surgery? An observational study from the Norwegian registry for Spine surgery evaluating patient reported outcome measures in lumbar spinal stenosis and lumbar degenerative spondylolisthesis

  

Spinal stenosis

Degenerative spondylolisthesis

  

N

(%)

1 year

Follow-up

Mean (SD)

Spear man’s rho

Change score Mean (SD)

Spearman’s rho

N

(%)

1 year Follow- up Mean (SD)

Spearman’s rho

Change score Mean (SD)

Spear- man’s rho

 

All

3060

 

23

(18)

0.77 *

16

(18)

0.66*

509

 

22

(18)

0.78*

19

(17)

0.64*

O

Compl.recovered

599

(20%)

4

(9)

 

32

(16)

 

117

(23%)

4

(7)

 

33

(15)

 

D

Much improved

1176

(38%)

17

(12)

 

21

(15)

 

213

(42%)

17

(13)

 

23

(14)

 

I

Slightly improved

658

(21%)

32

(12)

 

9

(13)

 

105

(21%)

36

(13)

 

9

(12)

 
 

Unchanged

283

(9%)

38

(13)

 

0

(10)

 

33

(6%)

38

(14)

 

5

(13)

 
 

Slightly worse

181

(6%)

42

(13)

 

0

(12)

 

21

(4%)

41

(13)

 

3

(13)

 
 

Much worse

117

(4%)

49

(12)

 

−3

(12)

 

11

(2%)

51

(11)

 

−8

(13)

 
 

Worse than ever

46

(2%)

59

(15)

 

−11

(12)

 

9

(2%)

57

(17)

 

−7

(15)

 
 

Missing

799

       

108

       
 

All

2464

 

0.64

(0.31)

0.73*

0.25

0.36

0.50*

419

 

0.67

(0.30)

0.78*

0.32

(0.34)

0.48*

E

Compl.recovered

463

(19%)

0.92

(0.15)

 

0.47

(0.32)

 

97

(23%)

0.93

(0.16)

 

0.51

(0.30)

 

Q

Much improved

945

(38%)

0.74

(0.17)

 

0.34

(0.32)

 

175

(42%)

0.75

(0.16)

 

0.37

(0.32)

 

-

Slightly improved

543

(22%)

0.55

(0.26)

 

0.19

(0.33)

 

89

(21%)

0.46

(0.29)

 

0.18

(0.31)

 

5

Unchanged

230

(9%)

0.41

(0.31)

 

0.03

(0.29)

 

26

(6%)

0.40

(0.30)

 

0.08

(0.33)

 

D

Slightly worse

148

(6%)

0.33

(0.32)

 

0.00

(0.32)

 

17

(4%)

0.36

(0.30)

 

0.13

(0.29)

 
 

Much worse

100

(4%)

0.15

(0.23)

 

0.15

(0.32)

 

8

(2%)

0.30

(0.34)

 

0.02

(0.08)

 
 

Worse than ever

35

(1%)

0.04

(0.22)

 

0.24

(0.37)

 

7

(2%)

0.08

(0.24)

 

0.03

(0.11)

 
 

Missing

1395

       

198

       

L

All

2988

 

3.5

(3.0)

0.72*

3.1

(3.3)

0.63*

493

 

3.2

(2.9)

0.68*

3.5

(3.2)

0.58*

E

Compl.Recovered

580

19%

0.6

(1.5)

 

5.9

(2.5)

 

112

(23%)

0.6

(2.2)

 

6.0

(2.5)

 

G

Much improved

1159

39%

2.5

(2.2)

 

4.0

(2.7)

 

208

(42%)

2.6

(2.2)

 

4.0

(2.7)

 
 

Slightly improved

640

21%

4.9

(2.2)

 

1.8

(2.6)

 

102

(20%)

4.8

(2.4)

 

1.8

(2.6)

 

P

Unchanged

275

9%

6.3

(2.1)

 

0.1

(2.3)

 

33

(7%)

6.1

(4.7)

 

0.4

(2.2)

 

A

Slightly worse

176

6%

6.4

(2.1)

 

0.7

(2.6)

 

18

(4%)

5.2

(3.0)

 

1.0

(2.9)

 

I

Much worse

114

4%

7.5

(2.1)

 

−0.5

(2.6)

 

11

(2%)

6.6

(2.3)

 

0.4

(3.8)

 

N

Worse than ever

44

1%

7.7

(2.1)

 

−0.4

(2.9)

 

9

(2%)

7.8

(1.9)

 

0.0

(2.1)

 
 

Missing

871

       

124

       

B

All

3033

 

3.8

(2.8)

0.76*

3.3

(2.9)

0.62*

507

 

3.6

(2.8)

0.78*

3.3

(2.9)

0.64*

A

Compl. recovered

592

20%

0.6

(1.4)

 

5.4

(2.5)

 

117

(23%)

0.7

(2.0)

 

5.8

(2.5)

 

C

Much improved

1171

38%

3.0

(2.0)

 

3.2

(2.5)

 

214

(42%)

3.0

(2.0)

 

3.7

(2.5)

 

K

Slightly improved

648

21%

5.2

(1.9)

 

1.4

(2.3)

 

105

(21%)

5.7

(1.7)

 

1.6

(1.8)

 
 

Unchanged

278

9%

6.5

(2.0)

 

0.5

(2.0)

 

32

(6%)

6.0

(2.0)

 

1.4

(2.1)

 

P

Slightly worse

182

6%

6.7

(1.8)

 

0.1

(2.0)

 

20

(4%)

6.7

(1.6)

 

0.3

(1.6)

 

A

Much worse

116

4%

7.4

(2.1)

 

−0.1

(2.2)

 

11

(2%)

7.3

(2.19

 

−0.2

(1.3)

 

I

Worse than ever

46

2%

8.3

(1.9)

 

−0.8

(2.3)

 

8

(2%)

8.5

(1.3)

 

−0.4

(1.4)

 

N

Missing

826

       

110

       
  1. Mean 1 year follow-up scores and mean change scores from baseline to follow-up for ODI, EQ-5D, NRS leg pain, and NRS back pain [positive values indicate decreased disability (ODI), improved health-related quality of life (EQ-5D), and reduced pain (NRS)]. Results are given for all patients, and for patients stratified according to the Global Perceived Effect (GPE) scale. The association between the outcome measurements and the GPE responses are given by Spearman’s rank correlation coefficients (Spearman’s rho)
  2. *p<0.005
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BMC Musculoskeletal Disorders

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